Sandbody Pinchout Description and Identification Technique of Lowstand Wedge-shaped Delta: Taking Panyu Field in Pearl River Mouth Basin as an Example

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  • Shenzhen Branch of CNOOC Ltd.,Guangzhou 510240,China

Received date: 2013-01-19

  Revised date: 2013-05-22

  Online published: 2013-12-10

Abstract

The main target formation of B-area in Panyu Field is a lowstand-tract wedge-shaped delta sandstone developing on the shelf break zone in SQ21.0 sequence,which has thin layers and fast horizontal changes.Aiming at the difficulties of low resolution of seismic data and the uncertainty of sand pinchout boundary,this paper built geological and geophysical model from seismic profile of typical deposition,studied on the seismic response on sand pinchout of calcareous high-velocity overlying strata and different shale interlayer thickness by forward modeling;on the base of these,we applied seismic attribute analysis and pre-stack simultaneous inversion to finely describe the sand pinchout line;lastly,we confirmed the availability of the technology combination with the verification of real seismic and drilled data.

Cite this article

LIU Jie, QIN Cheng-gang, ZHANG Zhong-tao, LIU Dao-li, WANG Xiu-ling, XU Hui, QU Liang,XU Le-yi . Sandbody Pinchout Description and Identification Technique of Lowstand Wedge-shaped Delta: Taking Panyu Field in Pearl River Mouth Basin as an Example[J]. Natural Gas Geoscience, 2013 , 24(6) : 1268 -1273 . DOI: 10.11764/j.issn.1672-1926.2013.06.1268

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